Pressure absorber arrangement for processing webs of textile goods



July 12, 1966 G. SCHIFFER 3,260,000 PRESSURE ABSORBER ARRANGEMENT FORPROCESSING WEBS OF TEXTILE GOODS Filed July 9, 1962 Imam/r04 Giint rerSchiffer y ,2 w 7 o United States Patent 4 Claims. 61. 34-442 Thepresent invention relates to a pressure absorber. Pressure absorberswith continuous passage of goods therethrough are known, according towhich a wide web of textile material is subjected to a steam pressurewhich is higher by several atmospheres than ordinary atmosphericpressure. With these heretofore known pressure absorbers, the goods arepassed into -a pressure absorber in form of a pressure container throughthe intervention of a sealing device which, in most instances, consistsof a sealing roller system, said goods passing between two sealingrollers. One of the sealing rollers has to be designed as an elasticroller in order to make sure that a good seal It has been found that thesealing ability decreases with higher steam pressures. While thisdrawback can at least to some extent 'be overcome by applying a highersqueezing pressure between the sealing rollers, the rollers will in suchan instance be operated at high squeezing pressure also when a lowerinner pressure prevails, with the result that the sealing strips aresubjected to an unnecessarily high stress, and also the drive for theroller system is subjected to unnecessary stresses while the impregnatedtextile material is squeezed unduly.

It is therefore an object of the present invention to provide a pressureabsorber which will overcome the above-mentioned drawbacks.

It is another object of this invention to provide a pressure absorber ofthe general type set forth above, which will have a relatively longlife, is simple in construction, and highly effective.

These and other objects and advantages of the invention will appear moreclearly from the following specification in connection with theaccompanying drawing in which:

FIG. 1 shows partly in view and partly in section a pressure absorberarrangement according to the present invention;

FIG. 2 is a plan view of a portion of the arrangement of FIG. 1, withparts broken away.

The present invention is characterized primarily in that the pressingdevice for producing the squeezing pressure is, through a pressureconduit, communicating with the inner pressure of the pressure absorberwhereby in addition to a preselected basic pressure, automatically anadditional pressure is eifected which at all times corresponds to therespective inner pressure.

According to a further feature of the invention, also the pressure towhich the sealing strips between the sealing rollers and the pressurecontainer are subjected, is controlled through a pressure conduit inconformity with the inner pressure of the pressure absorber.

Referring now to the drawings in detail, the arrangement shown thereincomprises a sealing device in the form of two steel rollers 1 havingpressed thereagainst an elastic roller 2, which is located above saidsteel rollers 1. The elastic roller 2 is pressed against the steelrollers 1 by a pressing device 11 which may be of any standardconstruction. The sealing of the steel rollers 1 with regard to thepressure container 5 of the pressure absorber is effected by two sealingstrips 4 which are equipped with elastic or metallic sealing lips. Thesaid sealing rollers and sealing strips are journalled in a rectangularbody 3. It is at the end faces 3a of said supporting said rollers.Fitting pieces 3b are adjustable to compensate for wear at the end facesof rollers 1. The goods 7 to be introduced into the pressure absorberpass between a steel roller 1 and the elastic roller 2 into the Thearrangement of the sealing rollers maybe such that the elastic roller islocated below the two steel rollers.

rollers. Arrangements are known according to which five or seven sealingrollers are employed with a corresponding larger number of sealingstrips.

According to the present invention, the pressing devices the selectedbasic pressure, also sub ected to an additional pressure through apressure conduit 8 which is connected to the pressure container 5. Inorder to avoid that the of a very high pressure. The basic pressure isproduced by a spring urged or weighted lever 12 pivotally supported at13 and connected to shaft 2a of roller 2 through the intervention of anarm 14 varied in conformity with the inner pressure of the pressurea'bsorber. In conformity with the invention, the sealing strips 4 aredesigned as elastic hollow bodies which, through a pressure conduit 9'likewise communicate with the inner pressure of the pressure absorber.The conduits 8" and 9 lead to a sealing device at the outlet end of thepressure absorber, which sealing device may correspond to that describedabove for the inlet to the pressure chamber 5.

It is, of course, to be understood that the present invention is, by nomeans, limited to the particular construction shown in the drawing, butalso comprises any modifications within the scope of the appendedclaims.

What I claim is:

1. A pressure absorber arrangement I for webs of textile goods, whichincludes: tainer for receiving and containing a pressure medium, saidpressure container being provided with an inlet and an outlet, a firstconveying and sealing unit arranged at said inlet, a second conveyingand sealing unit arranged at said outlet, each of said units including aplurality of roller means for passing a web of textile goodstherethrough and respectively into and out of said pressure container,first means connected to at least one of said processing a pressureCOI1-' 31161 means and continuously pressing it in the direction )wardthe other roller means of the same unit, second leans connected to atleast one of said roller means for messing the same in the directiontoward the other rollr means of the same unit, said second means beingpresure fluid operable, means for supplying fluid to said )ressure fluidoperable means comprising piston means ncluding a smaller firsteffective area connected with said iuid operable means and a largersecond effective area, and means communicating with the interior of saidpressure container for conveying pressure from the latter to said secondeffective area thereby to cause said first area to supply fluid at apressure greater than the pressure in said container to said pressurefluid operable means.

2. A pressure absorber arrangement according to claim 1 in whichinflatable sealing means are provided engaging said other roller meanson the side thereof opposite said one roller means, said sealing meansbeing connected to said first area.

3. A pressure absorber arrangement according to claim 2 in which saidother roller means are located in the respective unit adj ac ent saidcontainer while said one roller 5 spective unit a of spaced paracomprises a sing rigid rollers on the side djacent said contamer andcomprise a pair llel rigid rollers while said one roller means leresilient roller engaging both of said thereof opposite said container.

References Cited by the Examiner UNITED STATES PATENTS 'Minton 34-242Minton 34242 Corbett 34-242 Nakaguchi 34242 X Fujihashi 34242 X WILLIAMF. ODEA, Primary Examiner. 20 NORMAN YUDKOFF, ALDEN D. STEWART,

Examiners.

J. P. ROBINSON, A. D. HERRMANN,

Assistant Examiners.

1. A PRESSURE ABSORBER ARRANGEMENT FOR PROCESSING WEBS OF TEXTILE GOODS,WHICH INCLUDES: A PRESSURE CONTAINER FOR RECEIVING AND CONTAINING APRESSURE MEDIUM, SAID PRESSURE CONTAINER BEING PROVIDED WITH AN INLETAND AN OUTLET, A FIRST CONVEYING AND SEALING UNIT ARRANGED AT SAIDINLET, A SECOND CONVEYING AND SEALING UNIT ARRANGED AT SAID OUTLET, EACHOF SAID UNITS INCLUDING A PLURALITY OF ROLLER MEANS FOR PASSING A WEB OFTEXTILE GOODS THERETHROUGH AND RESPECTIVELY INTO AND OUT OF SAIDPRESSURE CONTAINER, FIRST MEANS CONNECTED TO AT LEAST ONE OF SAID ROLLERMEANS AND CONTINUOUSLY PRESSING IT IN THE DIRECTION TOWARD THE OTHERROLLER MEANS OF THE SAME UNIT, SECOND MEANS CONNECTED TO AT LEAST ONE OFSAID ROLLER MEANS FOR PRESSING THE SAME IN THE DIRECTION TOWARD THEOTHER ROLLER MEANS OF THE SAME UNIT, SAID SECOND MEANS BEING PRESSUREFLUID OPERABLE, MEANS FOR SUPPLYING FLUID TO SAID PRESSURE FLUIDOPERABLE MEANS COMPRISING PISTON MEANS